The education preview [0] looks like the first step toward supporting multiple user profiles per iPad. iPhones typically are one-person devices (on Android you can switch users, I've never tried it though), but iPads are often shared. I've seen lots of families where there's one iPad shared between the whole family. The kids are constantly logging in and out of their Facebook/Instagram/Twitter/E-mail accounts. The fact that they have to log in and out often usually leads to them using very weak passwords. I hope this feature makes its way to general consumption.